Final answer:
The amplitude of a light wave varies and is not constant across all light waves. It is related to the intensity or brightness of the light, and it affects the energy of the wave but is independent of the wave's speed and frequency.
Step-by-step explanation:
The question, Do all light waves have the same amplitude? can be answered by understanding that light waves, just like other types of waves, have properties like wavelength, frequency, and amplitude. First and foremost, the amplitude of a light wave is not constant across all light waves; rather, it can vary and is related to the wave's intensity—for light waves, this means the brightness of the light. Therefore, the correct answer is b) No, amplitude varies depending on the type of light wave.
The amplitude is independent of both the wave's speed and frequency. While the amplitude does impact the energy of the wave, with greater amplitude resulting in higher energy, it is not affected by the wave's velocity or the number of cycles it completes per second. The amplitude is also not exclusively associated with visible light; all forms of electromagnetic radiation have an amplitude.